Sökning: "nirK"

Hittade 3 avhandlingar innehållade ordet nirK.

  1. 1. Structure and function of microbial communities in constructed wetlands - influence of environmental parameters and pesticides on denitrifying bacteria

    Författare :Susann Milenkovski; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fungicide; concentration-response curves; nosZ; nirS; nirK; bacterial activity; denitrification; bacterial community composition; herbicide; insecticide;

    Sammanfattning : This thesis addresses the interactions and relationships between natural aquatic bacterial communities, environmental parameters, anthropogenic chemicals and the denitrification pathway in the habitat of agricultural constructed wetlands. The main aim was to gain fundamental knowledge of the drivers behind the processes of the denitrification (i.e. LÄS MER

  2. 2. Denitrification: from genes to ecosystems

    Författare :Christopher Jones; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Denitrification is a part of the global nitrogen cycle in which fixed nitrogen in the biosphere is returned to the atmosphere, which is mediated by diverse communities of microorganisms. This thesis seeks to gain a greater understanding of the ecology of denitrifying microorganisms by examining the pathway from four different aspects; gene, population, community, and ecosystem. LÄS MER

  3. 3. Denitrifying and nitrous oxide reducing genotypes : ecophysiology and niche differentiation

    Författare :Lea Wittorf; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES;

    Sammanfattning : Denitrification is a biogeochemical process of major importance for nitrogen loss from ecosystems. This four-step pathway is modular, as organisms can have different subsets and variants of the genes involved in each step. The last step is the only known biological sink of nitrous oxide, a potent greenhouse gas and ozone depleting substance. LÄS MER